Cutter



Nov. 12', 1929. c. J. ANDERSON 1,735,310

CUTTER Filed April 9, 1928 mum, v mum Patented Nov. 12, 1929 UNITEDSTATES- PATENT oFFIc CARL J'. ANDERSON, OF CHICAGO, ILLINOIS, ASSIGNDR.OF FIFTY-ONE AND TWO-THIRDS PER CENT TO ERIK BOB-G AND FIFTEEN PER CENTTO CARL U. JOHANSON, BOTH OF CHICAGO, ILLINOIS Application filed April9,

The invention relates generally to cutters and more particularly to highspeed power driven cutters which are adapted for cutting hard woodacross the grain to produce a uni formly smooth surface thereon.

Such cutters are especially useful for resurfacing butchers blocks,clickers blocks or the like which have become uneven or soiled. It iswell known that clickers blocks are made from exceptionally hard woodand that unless the upper surface of these blocks is kept comparativelysmooth, the rigid dies which are used thereon will be broken ordistorted.

The establishments which ordinarily use cutters of this type are not, ageneral rule, equipped for regrinding the cutting elements used and itis, therefore, important that the cutter be of such a character that theedges of the cutting element will withstand a maximum amount of usebefore it is necessary to resharpen or replace the elements.

The primary object of the invention is to produce a novel cutterembodying means operable to prolong the life of the cutting edgesthereon.

Another object is to provide a cutter adapted to be driven atv hi ghspeeds and embodying resilient means interposed between the drivingmeans and the cutting; elements so as to cushion the action of thecutting elements and thereby prolong the usefulness thereof. p

Another object is to provide a cutter of this character which is adaptedto use cutting elements which may be cheaply formed and readily replacedin the cutter.

Other objects and advantages will become apparent from the followingdescription taken in connection with the accompanying drawings, inwhich:

Figure 1 is a vertical central sectional view of a cutter embodying thepreferred form of the invention.

Fig. 2 is a bottom plan View of the cutter shown in Figure 11 While theinvention is susceptible of various modifications and alternativeconstructions, 1 have shown in the drawings and will CUTTER 192s. Serialno; .asssva herein describe in detail the preferred embodiment, but itis to be understood that I do not thereby intend to limit the inventionto the specific form disclosed; but intend to cover all modificationsand alternative constructions falling'within the spirit and scope of theinvention as expressedin the appended claims. I

It is contemplated that the cutter herein shown will be mounted in asupporting casing which. contains the driving means therefor and whichserves to guide the cutter in a desired relation to the surface uponwhich the cutter operates. The particular supporting casing does notform part of the present invention and, therefore, is not illustratednor described herein.

In the embodiment of the invention chosen for disclosure herein, thecutter assembly is mounted on a shaft 5 which is adapted to berota-tably supported in a vertical position in such a casing. Asupporting member in the form of a disk 6 is mounted on the shaft 5 andis preferably provided with an integral hub portion 7 which surroundsthe shaft and serves to support the disk rigidly in perpendicularrelation to the shaft. To secure the disk to the shaft forrotationtherewith a pin 8 is provided which extends through the shaft 5and the hub portion 7 of the disk.

A cylindrical member 9 is secured in concentric relation with the shaftto the outer edge oft-he disk 6 by means of screws 10 which extendthrough the disk and engage the walls of the cylinder. The cylinder 9extends downwardly from the disk 6 to a point adjacent the lower end ofthe shaft 5 and the inner edge thereof is annularly recessed at 12 so asto snugly receive the outer edges of a disk'13 which is rotatablysupported in fixed axial position at the lower end of the shafto. Thisdisk 13 is preferably provided with a suitable bearing 14 which servesto maintain the disk in perpendicular relation to the shaft 5 and whichalso serves to prevent wear and the wabbling of the disk which wouldresult from such wear. Atits upper side the disk 13 abut-s a shoulder 16formed in the cylinder 9 which prevents upward displacement of the diskalong the shaft. The disk 13 is'held against downward displacement alongthe shaft by means of a collar 17 which fits about'the lower end of theshaft in abutment with the outer surface of the disk 13 and whichcissecured on the shaft 5 by means of the pin 18 which e1;- tends throughthe collar and the shaft.

A plurality of lugs 20 are formed in similar positions at angularlyspaced intervals on the bottom surface of the disk 13 to which suitablecuttin elements 21 may be secured by means of tap screws 22 which extendthrough the cutting elements 21 and engage the lugs. It will be apparentthat the cutting elements 21 are simple in form so that they may becheaply manufactured and since they aresecured on the exterior of thecutter assembly, they may be readily removed for resharpening orreplacement.

To provide for a resilient driving connection between the driving shaft5 and the cut ter supporting disk 13, a coiled torsion spring 25 ispositioned within the cylinder 9 so that its opposite ends 26 engagesuitable apertures 2'? formed in the disks 6 and 18 near the outer6Cl9QS thereof.

It Will be apparent that by reason of the resilient driving connectionprovided between the driving means and the cutting elements, the cuttingedges of the elements will not be driven positively againstexceptionally tough fibres or other obstructions in the wood surfacesand that the dulling efiect of such tough fibres will, therefore, bereduced.

It will also be apparent that the invention provides a cutter which isadapted to use cutter blades which may be cheaply formed and readilyremoved from the cutter for replacement or resharpenin-g.

I claim as my invention:

1. A cutter having, in combination, a shaft adapted to be rotatablysupported in a ver tical position, a disk supported on said shaft forrotation therewith, a cylindrical member supported by and extendingdownwardly from the outer edge of said dish, a second disk havingcutting means on the lower side thereof, said dislrbeing rotatablysupported on said shaft and engaging the lower end of said cylinder toprevent upward movement of said disk along said shaft, means forsecuring said disk against downward movement along the said shaft, and acoiled torsion spring concentrically mounted within said cylinder withits opposite ends engaging said disks adjacent the outer edges thereof.

2. A cutter comprising, in combination, a shaft adapted to be rotatablysupported in a vertical position, a tool supporting member rotatablysupported in fixed axial position adjacent the lower end of said shaft,a plurality of lugs on the bottom side of said memher, a plurality ofcutting elements onesecured to each of said lugs, and means forming aresilient driving connection between said member and said shaft.

3. A cutter assembly comprising, in combination, a rotatable shaft, acutter mounted on said shaft and rotatable relatively thereto, andresilient means interposed between said shaft and said cutter totransmit a motion of said shaft to said cutter.

, t e cutter comprising, in combination, a shaft adapted to be rotatablysupported in a vertical position, 'a tool holder in fixed axial positionon said shaft and rotatable relatively thereto, a cutting tool removablysecured on said holder, and a coiled torsion spring surrounding saidshaft secured one end to said holder and at its other end to said shaft.

In testimony whereof, I have hereunto affixed my signature.

7 CARL J. ANDERSON.

